CRYSTAL QUEST Whole House Manganese, Iron, Hydrogen Sulfide 2.0 (Stainless Steel) Water Filter Systems contain naturally mined ore of manganese dioxide, which has been used in water treatment for more than 75 years for hydrogen sulfide, iron and manganese reduction. It functions as a catalyst, but itself remains relatively unchanged. It works on a principle whereby the hydrogen sulfide, iron and manganese are oxidized and trapped on the media. Simple backwashing cleans the filter. No regeneration is required. Nothing is imparted into the drinking water and it has a high capacity for low contaminant concentrations, and can be used in conjunction with aeration, chlorination, ozone or other pretreatment methods for difficult applications. Chlorine or other oxidants accelerate the catalytic reaction. All Whole House Manganese, Iron, Hydrogen Sulfide Water Filters include the following: 10 year Warranty on resin tank and brine tank assembly, 30 Day Money Back Guarantee, 5 year warranty on all Computer Monitored control valves, Low voltage transformer, and a bypass valve. It travels through 3 stages of filtration. In Stage 1, water flows through a 20-inch sediment filter cartridge that removes sediment, silt, sand dirt. It also extends the life of water softeners, water filters, and prevents damage to control valves or pumps. Next, water flows through a manganese, iron and hydrogen sulfide-removing media mineral tank. Finally, in the third stage, water flows through a 20-inch solid carbon cartridge for removing volatile organic carbon compounds (VOCs), insecticides, pesticides and industrial solvents. CRYSTAL QUEST Whole House Manganese, Iron, Hydrogen Sulfide 2.0 Water Filter System (Stainless Steel) also features: Solid 316-Stainless Steel Tanks: heavy-duty, burst-proof construction that is made to have a high capacity of manganese, iron and hydrogen sulfide-reducing media and a brine water conditioner, Riser style 1-inch internal flow distributor, a solid state microprocessor with LED display Electronics control valve, Chrome sleeve/jacket--Polyester fiberglass tank and a Stainless Steel Bypass Valve.